Hilarious - though I know you probably don't agree, but just to console you - can you imagine how that couple must have such a miserable life?
They probably whinged to each other all the way home about how they had such a terrible night and got stung for a scoop of ice cream.
There's always a few of them out there. Forget them and their miserable way. Tomorrow you'll meet mostly nice people and - hey - maybe you'll get a few kind words and a big tip.